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Imitate Facebook hide/show expanding/contracting Navigation Bar
...itself to a point where it completely vanishes. Then when the user scrolls down the navigationBar gradually shows itself.
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How to generate a random integer number from within a range
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All the answers so far are mathematically wrong. Returning rand() % N does not uniformly give a number in the range [0, N) unless N divides the length of the interval into which rand() returns (i.e. is a power of 2). Furthermore, one has no idea whether the moduli of rand() are independent: it...
Delete the first three rows of a dataframe in pandas
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doesn't that remove the first 4 rows instead the first 3 rows in the original question?
– tagoma
Nov 17 '16 at 18:16
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In C#, how do I calculate someone's age based on a DateTime type birthday?
... Just wanted to comment on DateTime.Now performance. If you don't need an accurate time zone value, use DateTime.UtcNow it's much faster.
– JAG
Jan 22 '09 at 10:29
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Clear terminal in Python [duplicate]
Does any standard "comes with batteries" method exist to clear the terminal screen from a Python script, or do I have to go curses (the libraries, not the words)?
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how to change an element type using jquery
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Here's one way you could do it with jQuery:
var attrs = { };
$.each($("b")[0].attributes, function(idx, attr) {
attrs[attr.nodeName] = attr.nodeValue;
});
$("b").replaceWith(function () {
return $("<h1 />", attrs).append($(this).con...
Mac OS X - EnvironmentError: mysql_config not found
...ld actually be called 'mysql_config5', and in this case, you would have to do this after installing: export PATH=$PATH:/opt/local/lib/mysql5/bin. You can find more details here.
Note1: I've seen some people saying that installing python-dev and libmysqlclient-dev also helped, however I do not know...
How do I comment out a block of tags in XML?
How do I comment out a block of tags in XML?
7 Answers
7
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What is an existential type?
...versal type ∀X they're saying: You can plug in whatever type you want, I don't need to know anything about the type to do my job, I'll only refer to it opaquely as X.
When someone defines an existential type ∃X they're saying: I'll use whatever type I want here; you wont know anything about the...
Using the HTML5 “required” attribute for a group of checkboxes?
... is clicked;
the browsers detects that the "required" field is empty and does not submit the form; instead browser shows a hint asking the user to type text into the field.
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